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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2005 Luca Barbato |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #ifndef AVUTIL_PPC_TIMER_H |
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| 22 | #define AVUTIL_PPC_TIMER_H |
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| 23 | |||
| 24 | #include |
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| 25 | |||
| 26 | #include "config.h" |
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| 27 | |||
| 28 | #define AV_READ_TIME read_time |
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| 29 | |||
| 30 | static inline uint64_t read_time(void) |
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| 31 | { |
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| 32 | uint32_t tbu, tbl, temp; |
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| 33 | |||
| 34 | /* from section 2.2.1 of the 32-bit PowerPC PEM */ |
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| 35 | __asm__ volatile( |
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| 36 | "mftbu %2\n" |
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| 37 | "mftb %0\n" |
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| 38 | "mftbu %1\n" |
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| 39 | "cmpw %2,%1\n" |
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| 40 | "bne $-0x10\n" |
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| 41 | : "=r"(tbl), "=r"(tbu), "=r"(temp) |
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| 42 | : |
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| 43 | : "cc"); |
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| 44 | |||
| 45 | return (((uint64_t)tbu)<<32) | (uint64_t)tbl; |
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| 46 | } |
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| 47 | |||
| 48 | #endif /* AVUTIL_PPC_TIMER_H */ |